Wrench.



R. B. FERGUSON.

WRENCH.

APP LICAT|0N FILED JULY so was.

Lmfimu Patented Apr. 22,1919.

ATTORNEY s ATNT more.

ROBERT B. FERGUSON, or os ANGELES, o LIEo NIA, ASSIGNOR TO ROBERT B. EEReUso1 \T, TRUSTEE.

WRENCH.

Application filed. July 30, 1918.

To all whom it may concern:

Be it known that I, RoBERT'B. FERGUSON, a citizen of the United States, residing at the city of Los Angeles, county of Los Angeles, State of California, have invented new and useful Improvements in Wrenches, of which is an improvement on the wrench described in United States Letters Patent 1,246,000 of date November 6th, 1917.

In that wrench the worm shaft passed through a guide plate on the end of the shank of the outer jaw which kept the shank of the outer and the free end of the worm shaft in fixed relation to eachother and both moved together. In my present wrench I dispense with such guide plate and form a stop to limit the outward movement of the free end of the worm shaft; thereby obtaining all the advantages of my former wrench, and the additional advantages of producing the wrench at less cost and of being able to separate the worm from the rack teeth of the outer jaw when desired, whereby a. quicker adjustment of the jaws to the work in hand is obtained than is possible with the other wrench.

In the drawings forming a part of this application Figure 1 is a side elevation, partly broken away, of the wrench adapted for use on nuts.

Fig. 2 is a side elevation of the wrench, oartly broken away, adapted for use on pipes.

- Fig. 3 is a section on the line 33 of Fig. 1 of the inner jaw.

Referring to the drawings, the handle 5 is substantially U-shaped in cross-section and is preferably formed by bending sheet metal into U-shape with front portions of greater width thereby forming ears 6 at each side between which ears is inserted a T-shaped spacing block 7 the front of which bears against the ears and the shank of which lies between the ears and is held secured thereto by rivet 8 which passes through the shank and ears. Block 7 and ears 6 form the rear jaw. The lower rear portion of the shank of the spacing block is cut out and forms a Specification of Letters Patent.

Patented Apr. 22, 1919.

Seria1'No.247,375.

recess to permit the worm shaft 9 to be mounted in the ears and shank by rivet 10. It will be seen that a. portion of the shank of block 7 lies above the end of the worm shaft and forms a stop at 11 to limit the outward movement of the free end of the worm shaft. A worm 12 is revolubly mounted on the worm shaft adjacent to cars 6 and is held positioned thereon by a sleeve 13 which is secured on the worm shaft preferably by being shrunk thereon. A flat spring 14 is secured to the front end of the handle in the bottom of the trough and projects rearwardly, and the free end normally projects upwardly as shown in Fig. 2. Mounting for sliding movement in the trough of the handle and passing below block 7 is shank 14: of the outer jaw 15. Shank 14; has rack teeth 16 which are. engaged by the worm when the wrench is operated. Loop 17, preferably made of wire, is swingingly mounted in the "handle at such position that the free end thereof will swing over the end of the worm shaft and hold the jaws parallel as shown in Fig. 1 when it is desired to use the wrench on nuts. Then the wrench is used on pipes this loop is disengaged from the worm shaft as shown in Fig. 2. If desired the worm shaft could terminate at the end of the worm, but I prefer to extend the same so that a better grip may be obtained on a pipe, and so that a pipe may be unscrewed from, as well as screwed to position.

Having described my invention I claim,

1. A wrench comprising an inner jaw having a handle U-shaped in cross-section; an outer jaw having a shank slidably mounted in the handle, the inner end of said shank being adapted to oscillate in the trough of said handle, said shank having rack teeth on the outer edge thereof; a worm shaft pivotally connected to the inner jaw, said jaw having a stop to limit the outward movement of the free end of said shaft; a worm revolu'bly mounted on said shaft and engaging the rack teeth of the shank of the outer jaw when positioned for use; and a. spring secured to the handle adapted to normally keep the worm and rack in engagement.

2. A wrench comprising an inner jaw having a handle U-shaped in cross-section; an outer jaw having a shank slidably mounted in the handle, the inner end of said shank being adapted to oscillate in the trough of said handle, said shank having rack teeth on the outer edge thereof; a worm shaft pivotally connected to the inner jaw, said jaw having a stop to limit the outward movement of the free end of said shaft; a worm revolu-bly mounted on said shaft and engaging the rack teeth of the shank of the outer jaw When positioned for use; and a spring secured to the handle adapted to normally keep the worm and rack in engagement; and a loop swingingly mounted in the handle adapted to be turned over the end of the Worm shaft and thereby hold the jaws With their faces parallel.

3. A Wrench comprising an inner jaw hav ing a handle U-shaped in crosssection; an outer aw having a shank slidably mounted in the handle, the inner end of said shank being adapted to oscillate in the trough of said handle, said shank having rack teeth on the outer edge thereof; a Worm shaft pivotally connected to the inner jaw, said jaW having a stop to limit the outward movement of the free end of said shaft; a Worm revolubly mounted on said shaft and engaging the rack teeth of the shank of the outer jaw When positioned for use; a sleeve on said shaft to hold the worm near the jaW, said sleeve terminating a little short of the outer end of said shaft; a spring secured to the handle adapted to normally keep the Worm and rack in engagement, and a loop swingingly mounted in the handle adapted to be turned over the end of the Worm shaft and thereby hold the jaws With their faces parallel. I

In Witness that I claim the foregoing I have hereunto subscribed my name.

R. B. FERGUSON.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents.

Washington, D. 0. 

